当字符串很大时，python mysql更新失败

Question

我有一个表格，需要更新文本列。 report_2_comments列是文本列。当我用一个小字符串更新列 - “这是测试消息”时，我没有任何问题但是当我使用下面给出的消息更新时，我收到此错误。

e ==  not enough arguments for format string

context = DbContext()
try:
    qry = """Update Report_Table 
                        set {2} = '{3}'
                        where valid_flag = 'Y' and report_status = 'C' 
                        and report_name = '{0}'
                        and date(report_run_date) = '{1}';
                    """.format('Daily Errors Report'
                        , '2016-07-09', 'report_2_comments', 
                        '8-3-2016 01:00 EST Affected DC region  1,000 errors over 2.5 hours (2%) 8-3-2016 13:00 EST Affected Virginia   500 errors over 11 hours (2%) 1233 8-3-2016 13:00 EST Affected 212/1412121001 - Date/skljld (sdlkjd)NOT_FOUND) 90,800 errors over 11 hours (2%) sldkdsdsd Fiber cut 8-3-2016 17:00 EST Affected 16703 - sdsdsd, WV (Tune Error) 15,400 errors over 7.5 hours (0.6%) sdkjd dskdjhsd sdkjhd')
    print 'update qry == ', qry
    output = context.execute(qry,())
except Exception as e:
    print 'e == ', e

QRY

Update vbo.Report_Table 
                        set report_2_comments = '8-3-2016 01:00 EST Affected DC region  1,000 errors over 2.5 hours (2%) 8-3-2016 13:00 EST Affected Virginia   500 errors over 11 hours (2%) 1233 8-3-2016 13:00 EST Affected 212/1412121001 - Date/skljld (sdlkjd)NOT_FOUND) 90,800 errors over 11 hours (2%) sldkdsdsd Fiber cut 8-3-2016 17:00 EST Affected 16703 - sdsdsd, WV (Tune Error) 15,400 errors over 7.5 hours (0.6%) sdkjd dskdjhsd sdkjhd'
                        where valid_flag = 'Y' and report_status = 'C' 
                        and report_name = 'Daily Errors Report'
                        and date(report_run_date) = '2016-07-09';

表格定义。

CREATE TABLE Report_Table (
    id bigint(19) NOT NULL auto_increment,
    report_name varchar(200),
    report_run_date datetime,
    report_status char(25),
    valid_flag char(1),
    report_1_comments text(65535),
    report_2_comments text(65535),
    report_3_comments text(65535),
    PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;